Is it just me, or does moving to a CC source attenuate the breathiness of the amp/pre-amp? I have three BH products (Foreplay II, SEX2.1, and Quickie). I have purchased the constant/compensating current boards for each, but I am reluctant to install them in the latter two builds based on my mixed perception of benefits in the Foreplay. I had the FPII for about a year before I installed the C4S boards, and my impression was that the bass was much improved, cleaner and more realistic. However, I felt like the high end lost some of its "realism," tube-iness, or breathy quality. I hope I am describing this quality understandably. I typically shy away from audiophile speak.
Later when I built my SEX2.1 amp, it brought back memories of that original, articulate sound, particularly on cymbals, whispers, and the like. It is a sort of "live" sound quality that I also get from the from the Quickie. I have spent a fair amount of time comparing the Quickie head-to-head with my old FP and there is more "clarity" in the top end with the Quickie, but the bass seems better controlled on the FP. Also, though the FP is not noisy, the Quickie is dead quiet. So, my question is: will my Quickie and SEX amp lose some of the magic like the FP did? The change was subtle, and I _did_ leave the C4S boards in the FP. The boards remain in the FP partly because the loss was small, and gain in the bass was significant. I know what obvious answer is: try it and see. I have already built up the boards and probably will install them, but I don't feel strongly compelled to. I just thought I would ask whether others have noticed a decrease in the tubey goodness when installing CC boards.
--Tad